Skip to Main Content
Mist net effort required to inventory a forest bat species assemblage.Author(s): Theodore J. Weller; Danny C. Lee
Source: Journal of Wildlife Management. 71(1):251–257
Publication Series: Miscellaneous Publication
PDF: View PDF (95.2 KB)
DescriptionLittle quantitative information exists about the survey effort necessary to inventory temperate bat species assemblages. We used a bootstrap resampling lgorithm to estimate the number of mist net surveys required to capture individuals from 9 species at both study area and site levels using data collected in a forested watershed in northwestern California, USA, during 1996–2000. The mean number of simulated surveys required to capture individual species varied with species’ rarity and ranged from 1.5 to 44.9. We retrospectively evaluated strategies to reduce required survey effort by subsampling data from 1996 to 1998 and tested the strategies in the field during 1999 and 2000. Using data from 1996 to 1998, the mean number of simulated surveys required to capture 8 out of 9 species was 26.3, but a 95% probability of capture required .61 surveys. Inventory efficiency, defined as the cumulative proportion of species detected per survey effort, improved for both the study area and individual sites by conducting surveys later in summer. We realized further improvements in study area inventory efficiency by focusing on productive sites. We found that 3 surveys conducted between 1 July and 10 September at each of 4 productive sites in this 10- km2 study area resulted in the capture of 8 species annually. Quantitative estimation of the survey effort required to assess bat species occurrence improves the ability to plan and execute reliable, efficient inventories. Results from our study should be useful for planning inventories in nearby geographical areas and similar habitat types; further, the analytical methods we used to assess effort are broadly applicable to other survey methods and taxa. (JOURNAL OF WILDLIFE MANAGEMENT 71(1):251–257; 2007)
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationWeller, Theodore J.; Lee, Danny C.; 2007. Mist net effort required to inventory a forest bat species assemblage. Journal of Wildlife Management. 71(1):251–257
Keywordsbats, inventory, species accumulation, species richness, survey effort, survey protocol
- Northern California redwood forests provide important seasonal habitat for migrant bats
- Using occupancy estimation to assess the effectiveness of a regional multiple-species conservation plan: bats in the Pacific Northwest
- A survey of reptiles and amphibians on Kinmen Island, Taiwan
XML: View XML